*Purpose*-

The purpose of archaeology is to learn more about past societies and the development of the human race. Over 99% of the history of humanity has occurred within prehistoric cultures, who did not make use of writing, thereby not leaving written records about themselves that we can study today. Without such written sources, the only way to learn about prehistoric societies is to use archaeology. Many important developments in human history occurred during prehistory, including the evolution of humanity during the Palaeolithic period, when thehominins developed from the australopithecines through to the early homos in Africa and finally into modern Homo sapiens. Archaeology also sheds light on many of humanity's technological advances, for instance the ability to use fire, the development of stone tools, the discovery of metallurgy, the beginnings of religion and the creation of agriculture. Without archaeology, we would know little or nothing about the use of material culture by humanity that pre-dates writing. However, it is not only prehistoric, pre-literate cultures that can be studied using archaeology but historic, literate cultures as well, through the sub-discipline of historical archaeology. For many literate cultures, such as Ancient Greece and Mesopotamia, their surviving records are often incomplete and biased to some extent. In many societies, literacy was restricted to the elite classes, such as the clergy or the bureaucracy of court or temple. The literacy even of aristocrats has sometimes been restricted to deeds and contracts. The interests and world-view of elites are often quite different from the lives and interests of the populace. Writings that were produced by people more representative of the general population were unlikely to find their way into libraries and be preserved there for posterity. Thus, written records tend to reflect the biases, assumptions, cultural values and possibly deceptions of a limited range of individuals, usually a small fraction of the larger population. Hence, written records cannot be trusted as a sole source. The material record may be closer to a fair representation of society, though it is subject to its own biases, such as sampling bias and differential preservation.

Theory-

There is no one singular approach to archaeological theory that has been adhered to by all archaeologists. When archaeology developed in the late 19th century, the first approach to archaeological theory to be practiced was that of cultural-history archaeology, which held the goal of explaining why cultures changed and adapted rather than just highlighting the fact that they did, therefore emphasizing historical particularism. In the early 20th century, many archaeologists who studied past societies with direct continuing links to existing ones (such as those of Native Americans, Siberians, Mesoamericans etc.) followed the direct historical approach, compared the continuity between the past and contemporary ethnic and cultural groups. In the 1960s, an archaeological movement largely led by American archaeologists like Lewis Binford and Kent Flannery arose that rebelled against the established cultural-history archaeology. They proposed a "New Archaeology", which would be more "scientific" and "anthropological", with hypothesis testing and the scientific method very important parts of what became known as processual archaeology. In the 1980s, a new postmodern movement arose led by the British archaeologists Michael Shanks, Christopher Tilley, Daniel Miller, and Ian Hodder, which has become known as post-processual archaeology. It questioned processualism's appeals to scientific positivism and impartiality, and emphasised the importance of a more self-critical theoretical reflexivity. However, this approach has been criticized by processualists as lacking scientific rigor, and the validity of both processualism and post-processualism is still under debate. Meanwhile, another theory, known as historical processualism has emerged seeking to incorporate a focus on process and post-processual archaeology's emphasis of reflexivity and history. Archaeological theory now borrows from a wide range of influences, including neo-Darwinian evolutionary thought, phenomenology,postmodernism, agency theory, cognitive science, Structural functionalism, gender-based and Feminist archaeology, and Systems theory.

*Methods*-

An archaeological investigation usually involves several distinct phases, each of which employs its own variety of methods. Before any practical work can begin, however, a clear objective as to what the archaeologists are looking to achieve must be agreed upon. This done, a site is surveyed to find out as much as possible about it and the surrounding area. Second, an excavation may take place to uncover any archaeological features buried under the ground. And, third, the data collected from the excavation is studied and evaluated in an attempt to achieve the original research objectives of the archaeologists. It is then considered good practice for the information to be published so that it is available to other archaeologists and historians, although this is sometimes neglected.Field Survey- The archaeological project then continues (or alternatively, begins) with a field survey. Regional survey is the attempt to systematically locate previously unknown sites in a region. Site survey is the attempt to systematically locate features of interest, such as houses and middens, within a site. Each of these two goals may be accomplished with largely the same methods. Survey was not widely practiced in the early days of archaeology. Cultural historians and prior researchers were usually content with discovering the locations of monumental sites from the local populace, and excavating only the plainly visible features there. Gordon Willey pioneered the technique of regional settlement pattern survey in 1949 in the Viru Valley of coastal Peru, and survey of all levels became prominent with the rise of processual archaeology some years later. Survey work has many benefits if performed as a preliminary exercise to, or even in place of, excavation. It requires relatively little time and expense, because it does not require processing large volumes of soil to search out artifacts. (Nevertheless, surveying a large region or site can be expensive, so archaeologists often employ sampling methods.) As with other forms of non-destructive archaeology, survey avoids ethical issues (of particular concern to descendant peoples) associated with destroying a site through excavation. It is the only way to gather some forms of information, such as settlement patterns and settlement structure. Survey data are commonly assembled into maps, which may show surface features and/or artifact distribution. The simplest survey technique is surface survey. It involves combing an area, usually on foot but sometimes with the use of mechanized transport, to search for features or artifacts visible on the surface. Surface survey cannot detect sites or features that are completely buried under earth, or overgrown with vegetation. Surface survey may also include mini-excavation techniques such as augers, corers, and shovel test pits. If no materials are found, the area surveyed is deemed sterile.Aerial survey is conducted using cameras attached to airplanes, balloons, or even Kites. A bird's-eye view is useful for quick mapping of large or complex sites. Aerial photographs are used to document the status of the archaeological dig. Aerial imaging can also detect many things not visible from the surface. Plants growing above a buried man made structure, such as a stone wall, will develop more slowly, while those above other types of features (such as middens) may develop more rapidly. Photographs of ripening grain, which changes colour rapidly at maturation, have revealed buried structures with great precision. Aerial photographs taken at different times of day will help show the outlines of structures by changes in shadows. Aerial survey also employs ultraviolet, infrared, ground-penetrating radar wavelengths, LiDAR and thermography.Geophysical survey can be the most effective way to see beneath the ground. Magnetometers detect minute deviations in the Earth's magnetic field caused by iron artifacts, kilns, some types of stone structures, and even ditches and middens. Devices that measure the electrical resistivity of the soil are also widely used. Archaeological features whose electrical resistivity contrasts with that of surrounding soils can be detected and mapped. Some archaeological features (such as those composed of stone or brick) have higher resistivity than typical soils, while others (such as organic deposits or unfired clay) tend to have lower resistivity. Although some archaeologists consider the use of metal detectors to be tantamount to treasure hunting, others deem them an effective tool in archaeological surveying. Examples of formal archaeological use of metal detectors include musketball distribution analysis onEnglish Civil War battlefields, metal distribution analysis prior to excavation of a 19th century ship wreck, and service cable location during evaluation. Metal detectorists have also contributed to archaeology where they have made detailed records of their results and refrained from raising artifacts from their archaeological context. In the UK, metal detectorists have been solicited for involvement in thePortable Antiquities Scheme. Regional survey in underwater archaeology uses geophysical or remote sensing devices such as marine magnetometer, side-scan sonar, or sub-bottom sonar.

Excavation-

Archaeological excavation existed even when the field was still the domain of amateurs, and it remains the source of the majority of data recovered in most field projects. It can reveal several types of information usually not accessible to survey, such as stratigraphy, three-dimensional structure, and verifiably primary context. Modern excavation techniques require that the precise locations of objects and features, known as their provenance or provenience, be recorded. This always involves determining their horizontal locations, and sometimes vertical position as well (also see Primary Laws of Archaeology). Likewise, their association, or relationship with nearby objects and features, needs to be recorded for later analysis. This allows the archaeologist to deduce which and features were likely used together and which may be from different phases of activity. For example, excavation of a site reveals its stratigraphy; if a site was occupied by a succession of distinct cultures, artifacts from more recent cultures will lie above those from more ancient cultures. Excavation is the most expensive phase of archaeological research, in relative terms. Also, as a destructive process, it carries ethical concerns. As a result, very few sites are excavated in their entirety. Again the percentage of a site excavated depends greatly on the country and "method statement" issued. In places 90% excavation is common. Sampling is even more important in excavation than in survey. It is common for large mechanical equipment, such as backhoes (JCBs), to be used in excavation, especially to remove the topsoil (overburden), though this method is increasingly used with great caution. Following this rather dramatic step, the exposed area is usually hand-cleaned with trowels or hoes to ensure that all features are apparent. The next task is to form a site plan and then use it to help decide the method of excavation. Features dug into the natural subsoil are normally excavated in portions to produce a visible archaeological section for recording. A feature, for example a pit or a ditch, consists of two parts: the cut and the fill. The cut describes the edge of the feature, where the feature meets the natural soil. It is the feature's boundary. The fill is what the feature is filled with, and will often appear quite distinct from the natural soil. The cut and fill are given consecutive numbers for recording purposes. Scaled plans and sections of individual features are all drawn on site, black and white and colour photographs of them are taken, and recording sheets are filled in describing the context of each. All this information serves as a permanent record of the now-destroyed archaeology and is used in describing and interpreting the site.

*Analysis*-

Once artifacts and structures have been excavated, or collected from surface surveys, it is necessary to properly study them, to gain as much data as possible. This process is known as post-excavation analysis, and is usually the most time-consuming part of the archaeological investigation. It is not uncommon for the final excavation reports on major sites to take years to be published. At its most basic, the artifacts found are cleaned, cataloged and compared to published collections, to classify them typologically and to identify other sites with similar artifact assemblages. However, a much more comprehensive range of analytical techniques are available through archaeological science, meaning that artifacts can be dated and their compositions examined. The bones, plants and pollen collected from a site can all be analyzed (using the techniques of zooarchaeology, paleoethnobotany, and palynology), while any texts can usually be deciphered. These techniques frequently provide information that would not otherwise be known and therefore contribute greatly to the understanding of a site.

History of archaeology-Flavio Biondo, an Italian Renaissance humanist historian, created a systematic and documented guide to the ruins and topography of ancient Rome in the early 15th century for which he has been called an early founder of archaeology. Ciriaco de' Pizzicolli or Cyriacus of Ancona (31 July 1391 — 1453/55) was a restlessly itinerant Italian humanist who came from a prominent family of merchants in Ancona. Ciriaco travelled all around the Eastern Mediterranean, noting down his archaeological discoveries in his day-book,Commentaria, that eventually filled six volumes. He has been called father of archaeology. After that, modern archaeology has its origins in the antiquarianism of Europe in the mid-19th century, where it developed soon after the scientific advancement of geology, which had shown that the Earth was billions rather than thousands of years old, as was then commonly believed. Soon after this, in 1859, Charles Darwin's On the Origin of Species was published, outlining his theory of evolution, eventually leading scientists to believe that humanity was in fact millions of years old, thereby providing a time limit within which the burgeoning archaeological movement could study. Meanwhile, in 1836 the Danish historian Christian Jürgensen Thomsen published A Ledetraad til Nordisk Oldkyndighed (Guideline to Scandinavian Antiquity) translated into English in 1848, in which he proposed the idea that collections of European artifacts from prehistory could be divided up into a three age system: the Stone Age, Bronze Age and Iron Age.Thomsen was not the first scholar to propose the three age system (that idea dated back to Greek and Roman thinkers), but he was the first to apply these categories to material culture, and with that innovation came significant advances in the concept of seriation, or stylistic changes through time. It was these three concepts of human antiquity, evolution and the Three-Age system that are often thought of as the building blocks for modern archaeology. Soon the early archaeologists began to investigate various areas around the world, with the study of ancient Aegean civilization being stimulated by the excavations of Heinrich Schliemann at Troy, and of Arthur Evans at Crete, whilst John Lloyd Stephens was a pivotal figure in the rediscovery of Maya civilization throughout Central America. However, the methodologies employed by these archaeologists were highly flawed by today's standards, often having a eurocentric bias, and many early European archaeologists often relied on anthropological and ethnographic accounts provided by the likes of Edward Tylor and Lewis Henry Morgan, thereby comparing contemporary "savage" peoples like the Native Americans with the historical peoples of Europe who lived in similar societies. Soon the new discipline of archaeology spread to North America, where it was taken up by figures likeSamuel Haven and William Henry Holmes, who excavated ancient Native American monuments. Further advancements in archaeological field methodology arose in the late 19th century. One of the pioneering figures in this was Augustus Pitt Rivers, who meticulously excavated on Cranborne Chase in southern England, emphasising that it was not only items of beauty or value that should be recorded but mundane items as well; he therefore helped to differentiate archaeology from antiquarianism. Other important archaeologists who further refined the discipline in the late 19th and early 20th centuries were Flinders Petrie (who excavated in Egypt and Palestine), Sir Mortimer Wheeler (India), Dorothy Garrod (the Middle East), Max Uhle (Peru) and Alfred Kidder (Mexico). Further adaptation and innovation in archaeology continued throughout the 20th century, in particular in the 1960s, when maritime archaeology was popularised by George Bass, urban archaeology became more prevalent with redevelopment in many European cities, and rescue archaeology was developed as a result of increasing commercial development.Popular views of Archaeology- Early archaeology was largely an attempt to uncover spectacular artifacts and features, or to explore vast and mysterious abandoned cities. Early archaeology was mostly done by upper class, scholarly men. This generalization laid the foundation for the modern popular view of archaeology and archaeologists. This generalization had been with our culture for a long time, before silent movies in popular fiction novels. Another popular thought that dates back to this era is that archaeology is monetarily lucrative. A large majority of the general public is under the impression that excavations are undertaken for money and not historical data. It is easy for the general public to hold this notion for that is what is presented to them through general media, and has been for many decades. The majority of the public view archaeology as being something only available to a narrow demographic. The job of archaeologist is depicted as a “romantic adventurist occupation”. To generalize, the public views archaeology as a fantasized hobby more than a job in the scientific community. Perpetuating the stereotype in modern cinema does nothing to help the scientific community. The audience may not take away scientific methods from popular cinema but they do form a notion of “who archaeologists are, why they do what they do, and how relationships to the past are constituted.” Major motion picture companies are more worried about the marketability of the film and the general dramatic interest of the public. Almost all popular portrayals of archaeologists fall into a few categories. Mcgeough labels them as “British thinkers, American fighters, and repressed librarians.” These labels mostly pertain to male archaeologists. Female archaeologists fall into the categories of “privileged women” with a love of adventure who are overly sexualized and “junior scholars” who are like the repressed librarians but are sexualized when their glasses come off and their hair is let down. The modern depiction is sensationalized so much that it has incorrectly formed the public’s perception of what archaeology is. The public is often under the impression that all archaeology takes place in a distant and foreign land, only to collect monetarily or spiritually priceless artifacts. Many times these artifacts are pursued for power and/or wealth. Alfred Hitchcock referred to such items in his films as the “MacGuffin: and object of pursuit, protected, and rescue by both hero and villain. We are led to believe that Indiana Jones is a hero for yelling, “It belongs in a Museum!” all while he yields a gun and destroys historical sites without the blink of an eye. Such pursuits continue to fascinate the public. Books, films, and video games, such as Indiana Jones, King Solomon's Mines, The City of Brass, Relic Hunter, The Mummy, Stargate, and Tomb Raider all testify to the public's interest in the discovery aspect of archaeology. Much thorough and productive research has indeed been conducted in dramatic locales such as Copán and the Valley of the Kings, but the bulk of activities and finds of modern archaeology are not so sensational. Archaeological adventure stories tend to ignore the painstaking work involved in carrying out modern surveys, excavations, and data processing. Some archaeologists refer to such off-the-mark portrayals as "pseudoarchaeology". Archaeology has been portrayed in the mainstream media in sensational ways. This has its advantages and disadvantages. Many practitioners point to the childhood excitement of Indiana Jones films as their inspiration to enter the field. Archaeologists are also very much reliant on public support, the question of exactly who they are doing their work for is often discussed.